Malicious PDF — malware analysis report

Static analysis result for SHA-256 f70a7590eb7b62d5…

MALICIOUS

PDF

73.4 KB Created: 2021-03-16 23:23:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 31a7d3dd0de1ae7a03aea32c3ca0a71f SHA-1: e04c9862ba82c3b7406a0fe113c2a9c13347cb3e SHA-256: f70a7590eb7b62d58296e3dfdfd436df18c196f65e79027a468b47fa96aed86b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gimoguvi.ru/wix?keyword=xbox+one+kinect+manual PDF link annotation
    • https://fewabobur.weebly.com/uploads/1/3/4/7/134713859/gipimofu-madaxupowi-vefipe-xojejiwale.pdfIn PDF document text
    • https://zufikuwokuz.weebly.com/uploads/1/3/4/5/134522796/9754266.pdfIn PDF document text
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/lupiwizev.pdfIn PDF document text
    • https://tatefelerer.weebly.com/uploads/1/3/5/9/135966089/53c91d2726a586.pdfIn PDF document text
    • https://wobakasufafe.weebly.com/uploads/1/3/2/6/132682589/meromo_vobubikelagag.pdfIn PDF document text
    • https://fogojokiverowur.weebly.com/uploads/1/3/0/9/130969702/jajasemobezefokaza.pdfIn PDF document text
    • https://telazavax.weebly.com/uploads/1/3/4/7/134729689/padisibadifok_kisurexi.pdfIn PDF document text
    • https://tejojobowadame.weebly.com/uploads/1/3/0/8/130874570/8225059.pdfIn PDF document text
    • https://daxedinojadu.weebly.com/uploads/1/3/4/5/134590150/4208825.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413866/normal_5fff3ff858f00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376086/normal_5fdb72e46d096.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jexijer/xalobareko.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/sapizifepiz.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/love_you_forever_line_dance_step_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/xolomuzasafodofogewamone.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/lonuwikege.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/cello_sheet_music_for_harry_potter_theme.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/ludujerotatuvufejorixavuf.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/java_gui_login_code_example.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/dragon_age_origins_mods_install.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/52343714532.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE447 4920 bytes
SHA-256: 243c08972292c3a2b499aa360b07ea40c5e907f15d03fb0637679e31cef13726
font_01_sfnt_off0000f4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F8 10420 bytes
SHA-256: 056fc64cd5f6011ef6adfb9495ff9893d9dd5d2bb681bd7df0ca9cfb44b09dd8

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